NH<sub>4</sub>I-Promoted and H<sub>2</sub>O-Controlled Intermolecular Bis-sulfenylation and Hydroxysulfenylation of Alkenes via a Radical Process
作者:Runfa He、Xiuwen Chen、Yibiao Li、Qiang Liu、Chunshu Liao、Lu Chen、Yubing Huang
DOI:10.1021/acs.joc.9b01047
日期:2019.7.5
An NH4I-promoted and H2O-controlled intermolecular difunctionalization of alkenes for the synthesis of bis-methylsulfane and beta-hydroxysulfides is presented. Mechanistic investigation revealed the reaction proceeds via methylthiyl radical addition to C=C of alkenes to give a carbon-centered radical and immediately cyclize to a thiiranium ion, followed by combination with H2O to afford beta-hydroxysulfides in 52-89% yields with chemo- and regioselectivities. In the absence of water, 1,2-disulfenylation takes place to give bis-methylsulfane in moderate to good yields.